Is it possible to use BIRT with a remote (http/https) XML data source that requires authentication?
Any of the above would suffice.
Try to use HTTP based authentication with a syntax:
But anyway you can use scripted data source and construct a report via API. I.e. you can write a Java software that pass an authentication and get data, bind them to BIRT and generate output in BIRT internal or standard format (html,pdf,doc,xls etc.).